<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 头像区域 -->
      <div class="avator_box">
        <img src="./../assets/logo.png" alt="">
      </div>
      <!-- 表单区域，ref用于拿到这个组件实例 -->
      <el-form ref="loginFormRef" label-width="0px" class="login_form" :model="loginForm" :rules="loginFormRules">
        <!-- username -->
        <el-form-item prop="username">
          <el-input prefix-icon="el-icon-user" v-model="loginForm.username"></el-input>
        </el-form-item>
        <!-- password -->
        <el-form-item prop="password">
          <el-input prefix-icon="el-icon-key" v-model="loginForm.password" type="password"></el-input>
        </el-form-item>
        <!-- 按钮 -->
        <el-form-item class="btns">
          <el-button type="primary" @click="validLogin">Login</el-button>
          <el-button type="info" @click="resetLoginForm">Reset</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
import { postInfo } from '@/utils/http'
export default {
  data () {
    return {
      // 表单数据绑定对象
      loginForm: {
        username: 'admin',
        password: ''
      },
      // 表单前端的校验
      loginFormRules: {
        username: [
          { required: true, message: '请输入用户名', trigger: 'blur' },
          { min: 3, max: 15, message: '长度在 3 到 15 个字符', trigger: 'blur' }
        ],
        password: [
          { required: true, message: '密码不能为空', trigger: 'blur' }
        ]
      }
    }
  },
  methods: {
    resetLoginForm () {
      // 重置登录表单
      this.$refs.loginFormRef.resetFields()
    },
    validLogin () {
      // 表单预验证
      this.$refs.loginFormRef.validate(async valid => {
        if (!valid) return false
        const { data: ret } = await postInfo('login', this.loginForm)
        // const { data: ret } = await this.$http.post('login', this.loginForm)
        if (ret.status !== '200') return this.$message.error('登陆失败！')
        this.$message.success('欢迎！')
        // 保存token，跳到首页
        window.sessionStorage.setItem('token', ret.token)
        this.$router.push('/home')
      })
    }
  }
}
</script>

<style lang="less" scoped>
.login_container {
  background-color: #2b4b6b;
  height: 100%;
}
.login_box {
  width: 450px;
  height: 300px;
  background-color: #fff;
  border-radius: 3px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);

  .avator_box {
    height: 130px;
    width: 130px;
    border: 1px solid #eee;
    border-radius: 50%;
    padding: 6px;
    box-shadow: 0 0 10px #ddd;
    position: absolute;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: #fff;
    img {
      width: 100%;
      height: 100%;
      border-radius: 50%;
      background-color: #eee;
    }
  }
}
.login_form {
  position: absolute;
  bottom: 0;
  width: 100%;
  padding: 0 20px;
  box-sizing: border-box;
}
.btns {
  display: flex;
  justify-content: flex-end;
}
</style>
